Yes, we have an idea what caused that and plan to have it resolved with the next release.

Now, I have this problem: Each time that I tried to do a process (Whatever), the system request me my user and password to continue:

When had you set up the user you were using to log in with? Because when a user is initially created, the password for it is only good for 24 hours. (At the first login after a user is created, I usually update the password for it at least before I log back out, so I don't forget.)